NSTextField suppressing multi line input

FROM : Warwick Hall
DATE : Sat Dec 01 05:05:05 2007

Hi All,

I have a normal NSTextField which i need to ensure has no line breaks 
in it. It works well since there is a default button that traps the 
enter and return keys. but if i go into TextEdit and type two lines

line 1
line 2

and copy both lines, and return to my app and paste the clip board 
into the NSTextField, both lines are entered. you need to up arrow to 
see the line 1 but it is there.

question: how do you stop the multi line input? NSTextFieldCell has a 
set clip mode method but that is more about how the clipped text is 
drawn. I need to stop it entering in the first place.

cheers,
omega